The American Psychological Association (APA) citation style is used frequently in Psychology, Business, Criminology, Economics, Education, Sociology, and widely throughout the social sciences and humanities. Here are some examples on how to cite various commonly used sources in APA style.
Calfee, R. C., & Valencia, R. R. (1991). APA guide to preparing manuscripts for journal publication. Washington, DC: American Psychological Association.
Davis, J. (n.d.). Familiar birdsongs of the Northwest. Available from http://www.powells.com/cgi-bin/biblio?inkey=1-9780931686108-0
Online Journal Article with DOI number:
Brownlie, D. (2007). Toward effective poster presentations: An annotated bibliography. European Journal of Marketing, 41, 1245-1283. doi:10.1108/03090560710821161
Online Journal with no DOI Number Retrieved Online:
Kenneth, I. A. (2000). A Buddhist response to the nature of human rights. Journal of Buddhist Ethics, 8. Retrieved from http://www.cac.psu.edu/jbe/twocont.html
Website (with no date given):
The College of William and Mary. (n.d.). College mission statement. Retrieved from http://www.wm.edu/about/administration/provost/mission/index.php
Website (with no author given):
All 33 Chile miners freed in flawless rescue. (2010, October 13). Retrieved from http://www.msnbc.msn.com/id/39625809/ns/world_news-americas/